Clamp for roofing-brackets, &amp;c.



No. ss4,a|5. Patented Oct. 22,1901. 0. m. HART.

CLAMP FOR ROOHNG BRACKETS, 81.0.

(Application filed Apr. B, 1901,)

(No Model.)

WITNESSES: 'INVENTOR.

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UNITED STATES PATENT @rrrcn.

CHARLES M. HART, OF BAY CITY, MICHIGAN.

CLAMP FOR ROOFING-BRACKETS, 840.

SPECIFICATION forming part of Letters Patent No. 684,815, dated October 22, 1901.

Application filedApril 8, 1901.

To all whom it may concern:

Be it known that I, CHARLES M. HART, a citizen of the United States, residing at Bay City, in the county of Bay and State of Michigan,have invented certain new and useful Improvements in Clamps for Roofing-Brackets, &c.; and I do hereby declare the following to be a full, clear, and-exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention is a clamp for roofing-brackets; and the improvement consists in certain means whereby I produce a clamp which antomatically holds the roofing-bracket to the roof more securely in proportion as the weight or strain upon the bracket increases.

The object of the invention is to provide a clamp which will not project to an objectionable extent from the frame of the roofingbracket and can be easily and quickly put into use without the aid of levers, screws, or other clamping devices.

My invention is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of a roofingbracket in approximately the position it would occupy upon a roof. Fig. 2 is a top View. Fig. 3 is a section of the clamp on the line 00 as of Fig. 2. Fig. i is a perspective View of the clamp.

As is clearly shown in the drawings, the clamp consists in a hinge composed of two straps or leaves secured to the upper end of the bracket A. The upper leaf 1 of the hinge has a transverse slot 1 near its forward end. The lower leaf 2 has a similar transverse slot 2 directly below the front edge of the upper leaf. In front of the slot 2* is a downwardlyprojecting flange 2 ,.made integral with the lower leaf of the hinge. At each side of the lower leaf are flanges 2 for reinforcing the flange 2 The lower leaf, the flange 2", and the two side flanges 2 together form a protecting-cap for the end of the bracket A. The operation of the clamp is as follows: A thin metal strap 13, such as is commonly used by roofers, is nailed at its upper end to the roof, and its lower end is gripped by the clamp in Serial No. 64,885. (No model.

the following manner: The free end of the strap B is passed up behind the flange 2", through the slot 2, and up past thefront edge of the upper leaf 1. The strap is then bent downwardly, passing through the slot 1, thence back between the two hingeleaves and up through the slot 1 at the knuckle of the hinge. It is then bent down flat against the upper side ofthe leaf 1. The lower leaf of the clamp is securely fastened by screws or otherwise to the bracket A. This bracket carries the usual scaifold-supporting arms A and A the positions of which are vertically adjustable by means of a bolt A passing through holes in the bracket A and through the lower end of the arm A. Any increase in the strain or load upon the bracket A tightens the strap B and pulls the upper leaf 1 of the hinge tightly down upon the lower leaf 2, thus firmly clamping the end of the strap B between the two leaves. At the forward edge of the leaf 1 and at the lower edge of the flange 2 I prefer to provide fillets f to avoid too sharp bending of the strap B.

Having described my invention, what I claim, and desire to secure by Letters Patent, is as follows:

1. A clamp of the class described comprising two hinged leaves, the upper leaf having a transverse slot near its outer edge, and a second 'slot between its inner edge and the pintle of the hinge, for the purpose set forth.

2. A clamp for roofing-brackets comprising two hinged leaves, the lower leaf adapted to be secured to the upper end of the roofingbracket, and the upper'leaf having a transverse slot near its outer edge, and a second transverse slot between its inner edge and the pintle of the hinge, said slots being adapted to receive a metal strap and to clamp said strap between said leaves, substantially as de-' scribed.

3. A clamp comprising two hinged leaves, the upper leaf having two transverse slots; the lower leaf having a transverse slot and a downwardly-projecting flange, substantially as described.

4. A clamp for roofing-brackets compris ing two hinged leaves; the lower leaf being adapted to be secured to the u er end of the havim two parallel transverse slots, for the roofing-bracket and having a downwardlypurpose described. 10 projecting flange and two side flanges form- In testimony whereof I affix my signature ing a protecting-cap for the upper end of said in presence of two witnesses. bracket; said leaf having a transverse slot in CHARLES M. HART.

' the rear of the downwardly-projeeting flange Tvitnesses:

an upper leaf hinged to the lower leaf and I. GOULD, provided with a fillet along its front edge, and E. F. WARREN. 

